1. the quality of being loyal and committed to someone or something
2. the quality of being accurate or true to an original

Examples

• Her faithfulness to her friends never wavered, even in difficult times.
• The dog’s faithfulness to its owner was remarkable.
• He questioned his wife’s faithfulness after finding the mysterious letter.
• The translation’s faithfulness to the original text was praised by critics.
• The artist’s faithfulness to historical detail made the painting very realistic.
• Their faithfulness to the company was rewarded with promotions.
• The faithfulness of the documentary to actual events impressed viewers.